Method and device for washing and purifying ocean engineering engine tail gas by means of seawater with zero energy consumption

Abstract

A process of using seawater to scrub and clean exhaust gas of engine in ocean engineering with zero energy consumption includes steps of leading the exhaust gas of engine into a scrubbing tower of a scrubbing and cleaning system, pumping seawater into the scrubbing tower with a seawater pump, scrubbing the exhaust gas of engine with the seawater in the scrubbing tower, and discharging clean exhaust gas and scrubbing seawater out of the scrubbing and cleaning system after scrubbing, wherein a step of recycling thermal energy of the scrubbing seawater is carried out before the scrubbing seawater is discharged out of the scrubbing and cleaning system, and in the step of recycling thermal energy, the thermal energy of the scrubbing seawater is recycled and used as the power of the seawater pump.

1 . A process of using seawater to scrub and clean exhaust gas of engine in ocean engineering with zero energy consumption, comprising steps of:
 leading the exhaust gas of engine into a scrubbing tower of a scrubbing and cleaning system;   pumping seawater into the scrubbing tower with a seawater pump;   scrubbing the exhaust gas of engine with the seawater in the scrubbing tower; and   discharging clean exhaust gas and scrubbing seawater out of the scrubbing and cleaning system after scrubbing;   wherein a step of recycling thermal energy of the scrubbing seawater is carried out before the scrubbing seawater is discharged out of the scrubbing and cleaning system, and in the step of recycling thermal energy, the thermal energy of the scrubbing seawater is recycled and used as the power of the seawater pump.   
     
     
         2 . The process of  claim 1 , wherein in the step that the thermal energy of the scrubbing seawater is recycled and used as the power of the seawater pump, the temperature difference between the scrubbing seawater and environmental seawater is utilized to generate the electric energy and the generated electric energy is used as the power of the seawater pump. 
     
     
         3 . The process of  claim 1 , wherein in the step of recycling thermal energy of the scrubbing seawater, the thermal energy is used for heating, and/or refrigeration and/or seawater desalination, so that the load of original power system of marine facilities is reduced to save electric power, and the saved electric power is transmitted out through the power system of marine facilities and used as the power of the seawater pump. 
     
     
         4 . The process of  claim 2 , wherein in the step that the temperature difference is utilized to generate the electric energy and the generated electric energy is used as the power of the seawater pump, the electric quantity generated in the thermoelectric power generation is used to adjust the seawater flow of the seawater pump to realize a stable and constant-temperature self-run of the seawater scrubbing and cleaning system. 
     
     
         5 . An equipment of using seawater to scrub and clean exhaust gas of engine in ocean engineering with zero energy consumption for carrying out the process of  claim 1 , comprising:
 a scrubbing tower;   a seawater pump;   an unit of utilizing thermal energy; and   an electric controller, wherein a seawater outlet of the seawater pump is connected to a seawater inlet of the scrubbing tower, and a scrubbing-water outlet of the scrubbing tower is connected a scrubbing-water inlet of the unit of utilizing thermal energy, and a scrubbing-water discharging outlet of the unit of utilizing thermal energy is communicated with a water discharging outlet of a scrubbing device, and the unit of utilizing thermal energy is electrically connected to the electric controller, and the electric controller is electrically connected to the seawater pump.   
     
     
         6 . The equipment of  claim 5 , wherein the unit of utilizing thermal energy is a semiconductor thermoelectric power generator, and the electric controller is a switch controller, which is connected to a startup power source, and/or a controller, which is connected to the power system of marine facilities. 
     
     
         7 . The equipment of  claim 5 , wherein the seawater pump is a motor pump in which the flow is adjustable based on inputted electric power. 
     
     
         8 . The equipment of  claim 5 , wherein the unit of utilizing thermal energy is composed of a heating and heat preserving device for ship oil tank and/or a lithium bromide refrigerating device and/or a seawater desalination device, and the electric controller is a controller which is connected to the power system of marine facilities. 
     
     
         9 . A marine ship, comprising the equipment according to  claim 6 .